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HelpTest Code LAB4944 CD19
Performing Laboratory
Barnes-Jewish Hospital
Methodology
Flow Cytometry
Profile Information: CD19 Pct, CD19 ALC
Specimen Requirements
Specimen Type: Whole Blood
Container/Tube: Lavender top (EDTA)
Specimen Volume: Full tube
Specimen Minimum Volume: 1.0mL
Day(s) Test Set Up
Monday through Friday
Cut-off time: 2100 Monday through Thursday; 1600 Friday and evening before a holiday.
Turnaround Time:
STAT: not available
Routine: 48 hours
Test Classification and CPT Coding
86355
Reference Values
| B Cells (CD19) |
|
| 0-3 Months | |
| Percentage: | 6%-32% |
| Absolute (Cells/mcL): | 300-2000 |
| 3-6 Months | |
| Percentage: | 11%-41% |
| Absolute (Cells/mcL): | 430-3000 |
| 6-12 Months | |
| Percentage: | 14%-37% |
| Absolute (Cells/mcL): | 610-2600 |
| 1-2 Years | |
| Percentage: | 16%-35% |
| Absolute (Cells/mcL): | 720-2600 |
| 2-6 Years | |
| Percentage: | 14%-33% |
| Absolute (Cells/mcL): | 370-1400 |
| 6-12 Years | |
| Percentage: | 13%-27% |
| Absolute (Cells/mcL): | 270-860 |
| 12-17 Years | |
| Percentage: | 6%-23% |
| Absolute (Cells/mcL): | 110-570 |
| Adult | |
| Percentage: | 6%-25% |
| Absolute (Cells/mcL): | 86-488 |
Specimen Transport Temperature
Ambient/Refrigerate NO/Frozen NO
Additional Information
Minimum Volume
1.0 mL
Alternate Tube(s)
1 dark green-top (sodium heparin) tube
Analyte Stability
Specimen cannot be refrigerated. Specimen must be processed within 48 hours of draw and kept at ambient temperature
Laboratory Processing Instructions
Test performed in BJH Flow Cytometry.